The Storage Compartment and Shape Maintainer is a black plastic accessory designed specifically for the SBA3 brace on your AR-15 pistol. Made in the United States, this accessory provides storage capabilities and maintains the shape of your SBA3 brace, ensuring your firearm stays safe and secure during transport or storage. The innovative design of this product adds functionality and convenience, making it a must-have for gun enthusiasts looking to enhance their AR-15 pistol. This is a 2-part plug for the SBA3 Arm Brace which is 3d printed using SLA resin printing with Siraya Tech Blu Nylon Black professional UV resin. It is designed to maintain the shape of the soft rubber on the SBA3 brace while being stored or transported, with an extended rear surface to enhance vertical storage. As an added bonus it can be used as a storage compartment. This item should be removed prior to use. Intended for storage and transportation use only. This listing is only for one of the 2-piece storage compartments of your choice... the SBA3 brace is not included.